package com.deercrowing.takeaway.interceptor;

import com.deercrowing.takeaway.common.constant.MessageConstant;
import com.deercrowing.takeaway.common.constant.TokenConstant;
import com.deercrowing.takeaway.common.exception.BusinessException;
import com.deercrowing.takeaway.common.properties.JwtProperties;
import com.deercrowing.takeaway.common.util.JwtUtil;
import com.deercrowing.takeaway.context.BaseContext;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

@Slf4j
@Component
public class LoginCheckInterceptor implements HandlerInterceptor {
    @Autowired
    JwtProperties jwtProperties;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        String Token = request.getHeader("token");
        if (Token.isEmpty()){
            throw new BusinessException(MessageConstant.USER_NOT_LOGIN);
        }

        String SecretKey = jwtProperties.getEncodedSecretKey();
        //2、校验令牌
        try {
            log.info("jwt校验:{}", Token);
            Claims claims = JwtUtil.ParseToken(SecretKey, Token);
            Long empId = Long.valueOf(claims.get(TokenConstant.EM_ID).toString());
            BaseContext.setCurrentId(empId);
            //3、通过，放行
            return true;
        } catch (Exception ex) {
            //4、不通过，响应401状态码
            response.setStatus(401);
            return false;
        }
    }
}
